R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Thread Tools Search this Thread
Old 09-21-2009, 03:07 PM   #1
Tech Adept
GSMike's Avatar
Join Date: Apr 2009
Location: Under Mount Etna
Posts: 189
Trader Rating: 4 (100%+)
Default "need" a venturi?

My understanding about the various venturi sizes is that they serve two purposes. In no particular order those purposes are:

A. Gas Mileage

B. Traction control (so the car is not "overpowered" and out of control.)

Is there any other purpose(s) the venturis serve? Also, if neither of the aforementioned items is an issue for me, is there any benefit to putting a smaller venturi in the carb?

Thanks for your help.
GSMike is offline   Reply With Quote
Old 09-21-2009, 10:48 PM   #2
Tech Master
Join Date: Jul 2007
Location: Rossville Ga
Posts: 1,398
Trader Rating: 10 (100%+)

You pretty much got it. Saving fuel taking away some of the power.
bigde2001 is offline   Reply With Quote
Old 09-22-2009, 10:07 PM   #3
Tech Regular
Join Date: Dec 2006
Posts: 365
Trader Rating: 1 (100%+)

You should get alittle more low-end and better throttle response due to the
increased speed of air entering the carburator when using a smaller venturi.
(better fuel,air atomization) On the flip side you'll lose some top-end. I hadn't
tested it yet, but soon will.
topcat-lll is offline   Reply With Quote
Old 09-23-2009, 07:18 AM   #4
Tech Lord
Frank L's Avatar
Join Date: Dec 2008
Location: NorCal
Posts: 12,521
Trader Rating: 148 (100%+)

Last weekend I put the smallest venturi in both of my engines 6mm. Th track was smaller and more technical. Here was one long straight on the back side that you could still open it up on. In the truggy there as a little overall power loss but I still had good bottom and top. In the buggy it acted like I har more top. The bfgy was so fast down the back straight that I would swear the engine was going to blow into pieces. Temp was not too high and there was a little smoke but not a whole lot. I was running a 6.5 in the buggy ao it's not a huge difference but I definatly did not lose any top end I may have gained some top end or it was just tuned right.
- X-Ray/ RC America Team Driver - MKS -
- XB8 - XB8T - XB8 E - OS Spec III - B2102 - 4PXR -
~ SSC ~ Godfather ~ Ironman ~ ButterySmooth ~
Frank L is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -7. It is currently 10:27 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net